java实现数据库mysql

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class MySQLTest {
    public static void main(String[] args) {
        // 数据库连接信息
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        try {
            // 加载驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立连接
            Connection connection = DriverManager.getConnection(url, username, password);

            // 创建 Statement 对象
            Statement statement = connection.createStatement();

            // 执行查询
            ResultSet resultSet = statement.executeQuery("SELECT * FROM mytable");

            // 处理结果集
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }

            // 关闭资源
            resultSet.close();
            statement.close();
            connection.close();
        } catch (ClassNotFoundException e) {
            System.out.println("驱动程序未找到！");
        } catch (SQLException e) {
            System.out.println("数据库连接失败：" + e.getMessage());
        }
    }
}